J??r??me Petazzoni works for dotCloud, where he leads the Site Reliability Engineering team, which is responsible for the uptime of the dotCloud platform. The platform hosts tens of thousands of apps using Python, Ruby, Node.js, Java, Perl, Go, PHP, RabbitMQ, Redis, Solr, ElasticSearch, MySQL, MongoDB, PostgreSQL, and many more. J??r??me took the time to talk to the SCALE Team about his presentation, “Lightweight Virtualization with namespaces, cgroups, and unioning filesystems,” which will be at 4:30 p.m., Saturday, Feb. 23, in room Century CD.